Merge pull request #74 from unsplash/1.4.1

Release 1.4.1

Merge pull request #72 from unsplash/release-1-4-0

Release 1.4.0

Merge pull request #67 from unsplash/update/1.3.0

Release 1.3.0

Merge pull request #56 from unsplash/update/1.2.2

Release 1.2.2

Update date ranges in 1.2.1 Changelog

Merge pull request #40 from unsplash/update/1.2.0

1.2.0 Release

Update version number in dataset credit

Merge pull request #16 from unsplash/bug/empty-landmarks

1.0.1 - Fix always empty landmark columns

Update TERMS and README